preferences: re-enable pipewire patch. it's still needed

overlays/preferences.nix

@@ -37,11 +37,14 @@
     };
   };
 
-  # pipewire = super.pipewire.override {
-  #   # avoid a dep on python3.10-PyQt5, which has mixed qt5 versions.
-  #   # this means we lose firewire support (oh well..?)
-  #   ffadoSupport = false;
-  # };
+  pipewire = super.pipewire.override {
+    # avoid a dep on python3.10-PyQt5, which has mixed qt5 versions.
+    # this means we lose firewire support (oh well..?)
+    # N.B.: ffado is already disabled for cross builds: this is only to prevent weird `targetPackages` related stuff.
+    # try `nix build '.#hostPkgs.moby.megapixels'` for example
+    ffadoSupport = false;
+    # ffado = null;
+  };
 
   # pythonPackagesExtensions = super.pythonPackagesExtensions ++ [
   #   (pySelf: pySuper: {